Aljunied is the hottest spot and I think WP could even win Aljunied GRC without LTK standing there. This is based on the general vote swing of 5% caused by demographic changes and adding on another 3% to 5% of branding and candidate factor, WP could well win Aljunied if it is left to George Yeo team. Most likely, KBW will be asked to shift to Aljunied but I guess nobody in his right mind would agree to do that. Too high risk to lose.
Goh Meng Seng
I have been researching the pap candidates in some grcs:
Sembawang has Khaw and Shanmugan
Hong Kah has YCT (no longer ministar)
Jalan Besar has LBY (no longer ministar) and Yaccob
Aljunied has GY and Lim Hwee Hua
Jurong has LBH and Tharman
East Coast has Jayakumar and Raymond
Bishan has WKS and NEH
TP has LKY and Lui Tuck Yew
AMK, MP, Tampines, West Coast and Pasir Ris headed by LHL, GCT, MBT, LHK and TCH respectively, one ministar.
Have I missed out anyone?
Normally full ministars don't contest SMCs.
Assuming no major changes in electoral boundaries, they may leave GY and LHH to contest Aljunied (which they will be confident because LHH's profile has increased and GY is quite popular)
They may put Gan in Hong Kah to replace YCT.
They may let Shanmugan, Raymond, NEH, Tharman and Vivian head their own grc, possibly replace LBY or perhaps as a backup to MBT.